Lifting-jack



(No Model.)

J. o. JOYCE.

LIFTING JAGK.

VPatented Maj 1, 1883.`

[zzn/022 for Q esse@ NA PETERSuFnlo-Lhhogmpmr. wnmingmn. D. c.

UNITED STATES PATENT OFFICE.

JACOB O. JOYCE, OF DAYTON, OHIO.

LIFTING-JACK.

SPECIFICATION formingpart of Letters Patent No. 276,827, dated May 1, 1883.

h Application filed February 26,1883. (No model.)

To all whom it may concern:

Be it known that I, JACOB O. JOYCE, a citizen of the United States, and a resident ot r Dayton, in the county ot' Montgomery and State of Ohio, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a specification.

My invention relates to a lifting-jack.

The object ot' my invention is to furnish a cheap, portable, and rapidly-working device adapted to raising light weights-such as railway-tracks and other work which requires, frequent shit'ting of the jack-all of which will be fully set forth in the description of the accompanyin g drawings. i

Figure l represents a vertical central section of my improvement. Fig. 2 is an elevation ot the top portion ot' the device shown transversely' to Fig. 1. Fig. 3 is a section on liuey y, Fig. 2. Fig. 4 is a section ou line .fr a', Fig. 2.

A represents the base of the `frame B, the barrel or stock of the jack, through the bore of which loosely slidesthe scre\v-th readed liftingbar C.

c represents the lifting-foot.

l) D represent segmental lugs, preferably east on and with the stock or barrel B. These lugs are grooved upon their inner sides, and form a bearingfor the nut-collar E, which is provided with au annular flange, E', journaling in the groovedsegmental lugs D.

H H represent lever-sockets cast ou and with the colla-r E.

The base ofthe frame A is slotted through, so as to allow the lifting-bar C c to be inserted into the stock or removed therefrom.

a represents the open Vslot or mortise in the base A.

The segment form of lugs D D allows the collar-nut E to be inserted in position or removed therefrom when the' lifting-bar C has of the bar C from those of collar-nut E. Thus the jack is readily put together and taken apart, as well as being light and portable.

Instead of having the lever-sockets H H rigidly attached to the collar-nut E, the barrel of the collar might be made manysided and be operated by a Wrench; or the exterior ot' the collar might be made to engage with a ratchetlever in common use in lifting-jacks; but such modifications would` still be embraced in the first clause of claims herein.

I claim- 1. A liftingjack combining in its structure the barrel B, supported bya base, and having upon its upper end stationary lugs, an intebeen run down so as to disengage' the threads tween the said lugs, which serve to prevent vertical movementthereof, and a screw-threaded lifting-bar, C, substantially as described. y

2. The combination, in a lifting-jaelqof the barrel B, provided with a base, A, and lugs D, fixed on its upper end, and having their inner ends grooved, with the iuteriory-threaded eollar E, having an annular flange, E', located in the grooves ot' the lugs. and a screw-threaded lifting-bar, C, substantially as described.

3. The combination, in a liftiug-jack, ofthe barrel B, supported by a base, and having lugs D D fixed on its upper end, with an interiorlythreaded collar, E, swiveled to the lugs, and constructed wi th laterally projecting leversockets li H', substantially as described. y

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JACOB O. JOYCE. 

